High Quality Rendering Engine for C++

http://www.antigrain.com/

Approximate grep (fast approximate pattern-matching tool)

File and directory integrity checker

https://aide.github.io/

802.11 WEP and WPA-PSK keys cracking program

http://www.aircrack-ng.org/

AirSpy's usemode driver and associated tools

https://airspy.com/

Collection of patience games written in guile scheme

https://wiki.gnome.org/Apps/Aisleriot

Morse code training program

http://www.nongnu.org/aldo/

Free multi-lingual font designed for screens

http://alef.hagilda.com/

Serif typeface originally intended for literature

https://github.com/huertatipografica/Alegreya-libre

Humanist sans serif font with a calligraphic feeling

http://www.huertatipografica.com/fonts/alegreya-sans-ht

Wrapper around the freetype2 library

http://opensnc.sourceforge.net/alfont/

Interpreter for purely symbolic LISP

http://www.t3x.org/alisp/

Cross-platform library for games and multimedia programming

https://liballeg.org/

Asteroids clone by Allen Smith

http://www.integrity.com/homes/tomandkaren/Allenroids/

Mail and news client descended from Pine

https://alpineapp.email/

ALSA compatibility library

https://www.alsa-project.org/

ALSA compatibility library plugins

http://www.alsa-project.org/

ALSA compatibility utils

http://www.alsa-project.org/

Amazon Simple Systems Manager Agent

https://github.com/aws/amazon-ssm-agent

Faithfully remade Amiga fonts

https://github.com/rewtnull/amigafonts

Extremely fast program for analysing WWW logfiles

http://www.analog.cx/

Andika TrueType fonts

https://software.sil.org/andika/

Integrated Development Environment for C and C++

http://anjuta.org/

Retrofuturism inspired monospaced programming font

https://github.com/benbusby/anomaly-mono

Fixed width sans designed especially for coders

http://www.ms-studio.com/FontSales/anonymouspro.html

Radically simple IT automation

https://www.ansible.com/

Sendmail milter wich uses McAfee Virus Scan or clamav

Application for displaying Microsoft(R) Word documents

http://www.winfield.demon.nl/index.html

ANother Tool for Language Recognition

https://www.antlr2.org/

ANother Tool for Language Recognition

https://www.antlr3.org/

ANother Tool for Language Recognition

https://www.antlr.org/

AV1 reference encoder/decoder

https://aomedia.org/

Ncurses based arcade game with only 64 lines of code

http://aop.raffi.at/

Java- and XML-based build tool, conceptually similar to make

https://ant.apache.org/

Apache Commons Byte Code Engineering Library

http://commons.apache.org/proper/commons-bcel/

Java library for command line arguments and options

https://commons.apache.org/proper/commons-cli/

Implementations of common encoders and decoders

https://commons.apache.org/codec/

Classes that extend/augment the Java Collections Framework

https://commons.apache.org/proper/commons-collections/

Wrapper code to start/stop a Java application as a daemon

http://commons.apache.org/daemon/

Apache Commons Database Connection Pool

https://commons.apache.org/dbcp/

Package implementing the client side of the HTTP standard

https://hc.apache.org/httpclient-3.x/

Apache library with helper utilities for the java.lang API

https://commons.apache.org/proper/commons-lang/

Apache library with helper utilities for the java.lang API

https://commons.apache.org/proper/commons-lang/

Generic logging wrapper library

https://commons.apache.org/proper/commons-logging/

Apache Commons Object-pooling API

https://commons.apache.org/pool/

Fast and flexible logging library for Java

https://logging.apache.org/log4j/2.x/

High performance search server built using Lucene Java

https://lucene.apache.org/solr/

Version 2.4.x of Apache web server

https://httpd.apache.org/

Automated password generator

APL385 Unicode monospaced code font

http://apl385.com/fonts